Final Exam 3 (20%)

Question

You are requested to help in writing a program to perform addition of two large number up to 50-digits. In C there is no builtin datatype for large number, but we can use characters and array to solve the problem.

Input: The input will contain two positive integers are separated by a blank, the two positive integers do not exceed 50-digits.

Output: Sum.

寫一個程式輸入兩個大數(最大50個位數)，計算其總合。C語言不提供大數資料型態，但我們可以用字元和陣列來解決這個問題。

Example input:

999999999999999999999999999999 999999999999999999999999999999

Example output:

1999999999999999999999999999998

 

Answer 1

Hidden content!
#include<stdio.h>
#include<string.h>
int main()
{
    int i,j,k,n,t=0,c[53]={};
*     *  * * *   *  ****** * ** a[51],b[51];
 *    ** *** ***  * **    * *  * %s",a,b);
 * ******  *****  ** *   *   ***  ** 
   *** * *    ** * *     **     **   **
 * *   ***    *    ** ** ** **** * ******
   ***  *** ***   ***   * ** * * ***** *     ** ********  *     
    }
 **  *     *  ** * ** *  *  *** ** * **  * *** *** 
** ** * *  *   *      * * *********  *   ******   *   *  * *** ** 
    }
* * *** * * *  * *  * *   *  *  ** * **   *   
**** * ** *** *  *  *    *     *  *   **** *   *  *** ****    
 *  ***   ** **  **   * **** *  ***   *****   * ****** *** **    *   ******* **   **  *
 **   *****      * *  ** ****   **   *        * * * ** *   *** *         * * ** 
*  * ** *    ** *********     **** **   * *   * *     
    }
********   ***** * *  *  *  **  ** **** * **** 
* **   * ****  *    *    * ** * *     **   * * ****   *  *  || t!=0){
*** *** ***   *  *** * *  * *   * *   * *  *  * ** * ***  *   ** ***    ***** * ** *****   ***   *  *****  **  
 *  **  *   **   *  * *   * * **  *   **   *  *  *  *****   * **     ** ** ** *  *
* **     * ***** *  * *******   **  * *     *    *  **  *
    }
**  *  ** *  *   *** **     *   0;
}

Comments

prog.c: In function 'main':
prog.c:7:7: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     k=strlen(a)-1;
       ^~~~~~
prog.c:7:7: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:7:7: note: include '<string.h>' or provide a declaration of 'strlen'

---

Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output

---

prog.c: In function 'main':
prog.c:19:22: warning: division by zero [-Wdiv-by-zero]
             c[i]=c[i]%0;
                      ^

---

Case 0: Correct output
Case 1: Correct output
Case 2: Correct output

Answer 2

Hidden content!
#include ***       * 
*  * *  **   *** *   *  *

int main()
{
*  **   *** **    **********     **** * *  *  * ****
** *     *  * *   ***** ** *   0;
}

Comments

Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output